PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: array_unique vs. !isset (integers)

Do note that this test is only using integer values (which is common for this), long strings will take longer to hash as array keys.

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Result: Saved

The test labeled "!isset()" was the faster by 0.0086 seconds, (1.662% faster)

!isset() 100%
array_unique() 98.338%

The !isset() test took 0.5082 seconds.
The array_unique() test took 0.5168 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 141,353 loops for a total of 2,827,060 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.429) milliseconds per 141,353 loops.
  • Total difference 8.59 milliseconds for 2,827,060 loops

The iteration variablity for Code 1 was (0.3165) milliseconds and Code 2 was (0.3328) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "!isset()", was:

$array = array();
for ($n = 0; $n < 8; $n++)
	for ($i = 0; $i < 50; $i++)
	{
		if (!isset($array[$i]))
			$array[$i] = $i;
	}

The second test, "array_unique()", was:

$array = array();
for ($n = 0; $n < 8; $n++)
{
	for ($i = 0; $i < 50; $i++)
		$array[] = $i;
}

$array = array_unique($array);

Running: Linux (x86_64:1 GB) PHP (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)